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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A239332 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it, modulo 4.

Table of values

n a(n)
1 2
2 31
3 2187
4 790681
5 1527488498
6 15397080750829
7 808844678734652790
8 222534953338562308679099
9 320707048341323698139814420023

List of values

[2, 31, 2187, 790681, 1527488498, 15397080750829, 808844678734652790, 222534953338562308679099, 320707048341323698139814420023]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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